Foam generating apparatus



May 9, 1933. e. M. TIMPSON FOAM GENERATING APPARATUS Filed June 18, 1929 2 Sheets-Sheet LEW/S & Mamas 77/IPSON Wad/flame ATTORNEY May 9, 1933. L. e. M. TIMFSON FOAM GENERATING APPARATUS Filed June 18, 1929 2 Sheets-Sheet ATTORNEY Patented May 9, 1933 1 NITED Mes LEWIS 'G. .MORRIS'EIM'PSONMOF*PLAINFIELD, .miw JEBSEY,.ASSIGNOR T PYJRENE- MINIMAX comaoaarron, .A ooarona'rxon' OEDELAWARE .FOAMaGENERATING APPARATUS Application filed June 18,

The present invention relates to fire fight ing apparatus and has for an object to provide an improved foam generator.

The invention provides a generator of the type adapted to be connected with a water supply for charging a stream of water flowing through the generator with chemicals to form foam. that the main body forms a chemical container which can be economically manufactured and may serve as the container for transporting the chemicals, and all of the connections for the water supply pipe and the foam outlet conduit are formed in the cover member. The Cover member can be quickly and readily attached to any number of similar containers.

The nature and objects of the invention will be better understood from a description of a particular embodiment for the purpose of which should be had to the accompanying drawings forming a part hereof and in which Figure 1 is a side view of a generator embodying the invention, part of the powder container being broken away,

Fig. 2 is a top plan view of the same,

Figs. 3 and 4 are side views taken at right is taken and showing the handle which operates the clamping means and the valve' in different positions.

The generator shown for the purposes 0t illustrating the principles of the invention 135 comprises a container 5 and a cover 6 attachable thereto. The generator is so constructed that the inlet nozzles, the foam outlet and all operating parts are carried inand as a part of the cover which may be at tached to any one of a number of similar containers and those containers may be of simple and relatively inexpensive construc-:

tion.

In the structure shown there is employed 1 a container of standard type, 1n fact a stand- In use the foam tormnig point -of use. r- 'tormed integralas a part A of the cover cast- The generator is so designed description reference 1929. E Serial N0. $71,840.

7 arranged to. direct the .water downwardly and ratwanuangle into :the foam forming MPOVClGI'lHdI-hB container 10.131-OV1C16 a swirling lnOt-lOltOfntllB Water and :a foam outlet 8 for leading the foam for-medy'to then If the inlet nozzles are not ing,they may be constructed of-suitablepipe fittings as 1nd1cated muthe drawings. The

flow of water through the inlet .10 to them nozzles 7 is'controlled by a suitable valve 11 to permit shutting off of the flow of water when moving the cover from one container to another.

The connection between the cover and them; powder contalner may be made in any suitablemanner but it is desirable that the same shouldybe air-tight .to prevent leakage of foanrorgas during the operation. To this .end the cover -:is provided with aresilientfrm packingring 12 placed. in an annular re- .cess .inlthe cover and positioned to-engage .thewtop edge of theicontainer. A suitable clamping means is provided todrawithe Ask! strap 15 which carries a. soft rubbenpad 16 and which surroundsfthetop of'the "conangles to the position from which Fig. 1

tainer. and operates when contracted to draw the cover tightly onto the containenaso The ends of the clamping'ring 15 terminate in collars 17 looselymounted'on a'rock shaft 18 and urged apart by a spring 19. These collars constitute-cams for operating with mating cams 20 keyed to the shaft as es by pins 21 and connected-bydahandle 23.

"When the handle 23 is moved downwardly to the position shown in'Figs. 1, 2 and 3,- the ring15-is contractedbut when the' handle 23 is liftedto theposition shown in Fig. 1

and in dotted lines in PFi'gJL the clamping ring is expanded and the COV81'1T1EIY be freely=' removed from the" container. The handle 23 serves with the :handle '25 forlit'ting the cover from one container to place it on-ua5 "another. and the release of the cover 'andithe removal from one containerinvolves prac- The valve ll'is also controlledby the hail- 1100 dle 23 as best shown in Fig. 1. The rock shaft 26 of the valve 11 carries an arm 27 which is connected by link 28 to the arm 29 on the rock shaft 18. The valve operating arm 27 is shown in Fig. 1 in open position in full lines and in closed position in dotted lines. It is desirable to make provision for a variation in the extent of downward movement of the handle 23 with containers which vary slightly in size and to this end an extensible yieldable connection is provided in the shaft 28 as indicated at 30. The operation of the valve closing arm'and the clamping cams are timed to maintain the cover tight while the valve is open, the

valve and cams operating successively. The foregoing part cular description 1s 11- lustrative'merely and is not intended as defining the limits of the invention.

I'cla'imz 1.- In an apparatus for generating fire foam comprising a container for foam forming chemicals, a cover attachable to said container, a clamping ring engageable with the outer periphery of said container, and means for contracting said clamping ring to seal the 'cov'eron the container, said means comprising a'handle serving as a lifting handle for the coverand operable to tighten saidclamping means.

'2. In an apparatus forfgeneratingffire foanr comprising a container forv foam Ering into close engagemenflwith the container, and'anbper'a'ting handle serving as a lifting-handle for the cover and movable relatively to the cover to: operate said clampwing-means. I is i ,co1nprising ,a container for foam forming forming chemicals, acover attachable to thecontainer comprising a sealing ring engageable with the to or the container,

clamping means' for drawing saidfsealing for ggenerating fire foam chemicals, a cover attachable tol the' convalve tainercomprising a sealing ring engageable v with the 'topof the container, said cover having a water inlet for. admitting Water therethrough to the container, a; valve controlling the flow of water through saidin- I let, clamping means for drawing said sealing ring into close engagement with the container, a movable lifting handle connected to thecoverand means connected tov said movable handle-for operating said zle directed into said'container said cover also having a foam outlet, a val've'control- I:

ling the flow of water through said inlet, clamping means forsecuring said cover to the container, and an operable handle mov- 

